Strip-forming machine



Nov. 26, 1929. H. 1 FINKELSTEIN STRIP FRMING MACHINE` Filed Dec. 23, 1925 7 sheets-sheet Nov. 26, 1929. H. L. FlNKELsTElN T5737367 STRIP FORMING MACHINE l Filed Deo. 23, 1925 7 Sheets-Sheet 2 Magico@ n61H20 swag Nov. 26, 1929. H. l.. FINKELST'EIN 1,737,367 f STRIP mamme MACHINE Filed Dec. 23, 1925 'l sheets-sheet 3 Nov. 26, 1929.

H. L. FINKELSTEIN STRIP FORMING MACHINE 7 Sheets-Sheet 4 Filed Dec. 23, 1925 Nov. 26, 1929. H. L. FlNKELs'n-:IN 1,737,367

STRIP FORMING MACHINE Filed Dec. 23, 1925 '7 Sheets-Sheet 5 lllllll n alllllll mi' 47 Il 75' .ey I

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Nov. 26, 1929. H. L. FINKELSTEIN STRIP Femme MACHINE Filed Deo. 23, 1925 '7 ,sheetsheet 6 "kry Suva/Moz Nov. Z6, 1929.

H. L. FINKELSTEIN 1,737,367

STRIP FORMING MACHINE Filed Dec. 25, 1925 'r shets-sheet 7 Patented Nov. Z6, 1929 HARRY L. EINKELSTEQIN, OF NEVI YORK, N. Y., ASSGNOR TG. MANHATTAN TERRAZZO Basse STR-11?. co. Inc.,

.10F NEW Yee-K. N- t..

Smm-remmer MACHINE,

This invention relates to a strip-forming machine, and has for its object to provide a semi-automatic machine for forming twin anchor brass dividing strips for terrazzo and other plastic work.

A further object is the provision of a machine that will form such strips expeditiously and economically. @ther objects will become apparent as the description proceeds.

Vhile I have disclosed a preferred embodiment of the machine for purposes of illustration, it should be understood that the structure may be modified in various ways without departure from the true spirit and scope of the invention as hereinafter defined and claimed.

In the'drawings Fig. 1 is a plan view of the machine.

2 is an end elevation 'looking from the right in Fig. 1.

Fig. 3 is an enlarged parts'shown in Fig. 1.x

detail of some of the,

Fig. 4 is a section on line 4 4 of F ig. 1 Fig. 5 is a section on line 5-5 of Fig. 1

Fig. 6 is a section on line 6 6 of Fig. 1

Fig. 7 is a section on line 7 7 of Fig'. 1.

Fig. 8 is a section on line 8-8'of Fig. 7 Fig. 9 is a section on line 9.-9 of Fig, Fig. 10 is a section on line 16-10 of Fig. 7.

Fig. 11 is a detail of the cam means used lto operate the clamping jaws.

Fig. 12 is ay section online 12-12 of Fig.r 1. Fig. 13 is a section on line 13-13 of Fig. 14. 'Fig 1 4 is a detail of the strip-supporting means. v Fig.A 15 is a perspective View of a completed strip.

Fig. 16 is a si strip.

Fig. 17 is a section on `line 17-17 of Fig. 16. Referring more particularly to the drawings, the legs 20, 21 and 22 carry cross arms 23, 24 and 25, upon which the main parts of the machine are carried. Longitudinal Sup- 45, lports V26, 2,7, 28 and 29 are secured on'afrms and 25 in spaced relation to each other. Short brace members 30 and 31 are secured to supports 26 and 27 While brace members 32 and 33 are secured to supports 28 Vand 29. A rotary shaft 34 is mounted in bearings de elevation of a modified 35 on supports 23, 24, 30, 31.v and 25. A second shaft 36 ismounted in bearings 35 on supports 23, v2.4, 32, 33` and 25.` The shafts are driven through interineshing gears v 37 Vand 38 keyed to shafts 34 and 36 respectively.

movement by guide redsVV 52 secured tothe jaw and slidable through the supports 26 and 27. yJaw 48 is 'guided by similar guide reds slidable through supportsl and 29. Guide blocks 53 ig. 3) are mountedv in the jaws and press firmly against the sides of i the strip. A

The jaws are pressed together by cams 54 which are 4mounted' on supports 27 and l l (F ig` 4),. Jaw 47 is lguided in its lateral 28 and are operated through rotation of gears 57 by iacks' carried on rack bars 56,A the bars being reciprocaitedr by cams 58 and 59 keyed to shafts 34 and 36 respectively. Sim-v ilar cam grooves 60 are formed in cams 58 i and 59. A sleeve 61 (Fig. 11), slidably keyed Y on each rack bar 56, carries a roller`62 riding in cam groove 60. An expansion spring 63, stiffer than springs 49, normally holds the sleeve 61- in extended position.

When the machiney is operated from the position shown in Fig. v1, the'cam 59 vwill be rotated in a contraclockwise direction. The cam groove is so formed that during the first part of the rotation the rack bar will remain in the position shown, and the jaws will remain closed for the work period. During the next part of the rotation the bar is moved quickly toward the right, releasing cams 54, and allowing springs 49 to fully'open the f' jaws. yThe formed Istrip drops-through the jaws tothe delivery slides 110, and the baiv is then moved toward the left, partially closing theV jaws. The machine then automatically stops for the insertion of a second blank strip, and upon starting the machine post 67 against the support member. It will.

again the bar is moved farther to the left, closing the jaws upon the second blank. Should the jaws close Vfirmly before the roller 62 has reached the extreme limit of its movement to the left, the0 spring 63 will yield, preventing any strain on the mechanism.

The jaws 47 and 48 musty separate a suflicient distance to allow a finished strip 64 having oppositely extending ears 65 to pass between them. Such a wide separation of the jaws would allow a newly inserted blank to fall on its side instead of standing upright. Supplemental jaws 66(Fig. 3) are therefore provided which will have a smaller clearance when opened and which will clamp the strip between the points at which ears 65 are formed. These supplemental jaws are carried on posts 67, which are slidable in the main jaws and are mounted on supports 27 and 28 for limited movement. Each` post 67 has a reduced extension 68 which slides in a corresponding opening formed in the support member. A spring 70 surrounds the extension 68 ina ountersink 69 formed in the support member', said spring pressing Y against a stop 71'on the extension and tending `normally to hold the shoulder 72 on e evident that when the main jaws 47 and Y 48 are moved together by the cams 54 they i. Ywill carry with them the supplemental jaws 66. When jaws 47 and 48 are allowed to sep:

arate, jaws 66 will separate underiniluence of springs 70 until the shoulders 72 contact with the support members. This will allow Vlonly a limited separation between the supplemental jaw members, while the main jaw members will continuev to separate as far as the members supporting cams`54 will permit. Guides 73 are provided to facilitate the insertion of the blank strips between the aws.

' f The lower edge of theblank strip is normal-- 1yf supported on studs 7 4y secured to jaw 47 (.FigsQ6, 12 and 13)."111 some instances it is desired to use theV machine to form strips `vthat `are narrower than the one illustrated,

"in Fig. 3.v Thejinner'ends of the tools areA andwhich must be supported in a higher position inthe machine. For this purpose spring-pressed pins 75`are'mounted vertically in studs 74 and are adapted' to be raised by cams 76 formed on rod 77 when the latter is moved to the left in Fig. 1 2. The strip will then rest on the upper ends of pins 75. The

While the strip is' held between the jaws, the ears are punched by the tools 79 (Figs. 3 and 5), which are mounted in offset pairs on opposite sidesof the strip as clearly shown guided in blocks 53 by sidewear-plates 80 and top plates 81. VThe outer ends of the tools trol rod 95.

rod 77 is guided in members 78 secured to jaw The operation of the machine is controlled by the clutch 45 now to be described. The

sprocket 44, which is idly mounted on shaft 34, is continuously rotated. Clutch member 89 is keyed to shaft 34 and carries the clutch dog 90, which is adapted to extend into a slot 91 formed in the face of sprocket 44 to cause member 89'to rotate with thesprocket. The dog has a shank 92 which is surrounded by a spring 93 normally pressing the dog toward the slot 91. The member 89v is provided with a groove 94 into which a control rod 9 5 extends. The control rod is mounted in a guide 96 and is normally projected into the groove 94 by a spring 97. The control rod carries a cam face 98 which cooperates with a cam face 99 formed on the dog to retract;

the latter from the slotf91, l

A head 100 formed on the lower end of the control arm contacts with the framework to limit the upward movementof the arm, said head having a hook 101 formed thereon. A rod 102 is mounted to reciprocate4 in the framework and is guided by a pin 103 moving in a slot 104 formed inthe framework. A hook member 105, formed to complement the hook 101, is pivoted on pin 103 and carries la cam surface 106 for cooperation with pin 107 mounted on the framework. The rod carries an offset extension 108 uponwhich vbears the spring 109 normally holding hooks 101 and 105 in contact;V Rod 102 isreciprocated by depressing the pedalyllO against the action of spring 111.

The operation of the'machine is as follows :f Y

lWhen the pedal is depressed the rod 102 is moved downward, carrying with it the con- This action allows dog 90 to engage in slot 91, and hence causes member 89 and shaft 34 to rotate with sprocket 44. As rod'102 continues its downward movement the cam surface 106 engages pin 1017, moving hook 105 out of engagement with hook 101 and allowing the control rod 95 to be again projectedinto groove 94 by spring 97. HenceV as member 89 rotates Vthe cam surface 99 formedondog 90 will ride up cam Surface 98 formed on the controlrod, whereby the dog wil be retracted from slot. 91 and shaft 34 will come to rest after one complete'rotation with the parts again in the position shown in Fig. 7. Afterv the foot pedal is releasedy the spring 101 raises the pedalr and rod 102 so that hooks 101 and 105 again become en.- gaged, :nd the clutch mechanism .is ready for anothei cycle of operation.

As shaft 34 moves, both cams 58 and 59 rotate, controlling the ope-ration ot the clamping jaws through mechanism set forth above. During the irst part of their rotation the jaws close upon the blank, and while it is rig? idly clamped, the cams move the tools 79 to punch out the ears 65. All of the tools are not moved simultaneously, but they are divided into groups and operated in sequence to distribute the strain. The jaws then open widely, allowing the formed strip to drop through the jaws to the delivery slide 112, and

then close to the point where the main jaws start to move the suplementary jaws. At this point the machine comes to rest and is ready to receive another blank strip.

By using square tools 7 9, square ears 65 will be formed as shown in F ig. 15, or by using triangular tools the machine will form triangular ears as shown in Figs. 16 and 17.

IVhat I claim is:

l. In a strip forming machine, means for gripping astrip, means for punching ears to project in opposite diiections from said strip while it is gripped, means for releasing said strip, and a control means upon a single actuation of which all of said means are operated.

2. In a strip forming machine, means for gripping a strip, means for punching ears to project in opposite directions from said strip while it is gripped, means for releasinv said strip, a control means upon a single actuation of which all oi said means are operated, and means for automatically stopping said machine after each ot' said means has been operated once.

3. In a strip forming machine, cam actuated means ;tor gripping a strip, cam actuated means for punching an ear from said strip while it is gripped, cam actuated means for releasing said strip, and a control means upon a single actuation of which all of said means are operated.

4. In a strip forming machine, cam actuated means igor gripping a strip, cam actuated means for punching an ear from said strip while it is gripped, cam actuated means for releasing said strip, a control means upon a single actuation oiC which all of said means are operated, and means for automatically stopping said machine after each of said means has operated once. Y

5. In a strip forming machine, means for gripping a strip, means located on each side of said strip for punching an ear from said strip, means for releasing said strip, and a control means upon a single actuation of which all of said means are operated.

G. In a strip forming machine, means for gripping a strip, means located on each side ot said strip for punching an ear from said strip, means for releasing said strip, a control means upon a single actuation or" which all of said means are operated, and means for automatically stopping salidmaehine after each ot said means has operated once.y

v7. In a strip forming machine, primary jaws for gripping a strip, supplemental gripping jaws actuated by movement of said primary jaws, means for opening and closing ycontrol means, andoperating means Jfor causing one complete rotation of each of said cam means upon a single actuatioiiof said control means.

9. In a machine of `the kind described,

spaced pairs ot gripping jaws movable toward and from each other, cams pressing against said jaws to force the jaws of each pair towards veach other, and means for simultaneously actuating all or" said cams.

10. Inv a machine of the kind described,

spaced pairsot gripping jaws movable tvoward and from each other, rotatable cams pressing against said jaws to `torce the jawsof each pair towards'each other, gears asf sociated each with a'respective-cam to rotate said cam, rack bars each meshing with all or" the gears on 'a respective side of said'jaws, and means `tor simultaneously reciprocating said rack bars. l .Y

11.'In a machine'v'ot the kind described,

spaced pairs of gripping jaws movable.-

toward and irom each other, rotatable cams pressing against said jaws'to force theyjaws of yeach pair towards eachother,

gears associated each with a respective cam to rotate said cam, rack bars each meshing with n all of the gears on a respective side ot said shafts for rotatingthe shafts in unison, and a camV on each shaft having operative con nection with the rack bars to reciprocate the same.` l' v Y '12.l In a ymachine of the kind described,

spaced pairs of grippingjaws' movable to-4 ward and from each other, cams pressing against said jaws to force the jaws of each pair towards each other, means tor simultaneously actuating all ot' said cams', spaced pairs of punching and bending members arranged to move at right angles to the jaws, each pair being arranged with its members on opposite sides ot' the series of jaws and operable oppositely to each other, and means for simultaneously actuating said punching and bending members in timed relation to the closing or" said jaws.

13. In a machine of the kind described, spaced pairs ot gripping jaws movable vtoward and from each other, rotatable cams pressing against said ljaws to torce the jaws jaws, a pair'of'sha'fts, gears connecting said.`

ies.

ofeach pair towards each other, gears asso-V ciated each with a respective cam to rotate said cam, rack'bars each meshing with all of the gears on a respective side of said jaws, means for simultaneously `reciprocating said rack bars, yspaced pairs of punching and bend.- ing members arranged to move at right angles tothe jaws, each pair being arranged with its members on opposite sides of the series of `jaws and operable oppositely to each other, and means for simultaneously actuating Said punching and bending members in timed relation to the closing of saidjaws.

14. In a machine of the kind described, 15 spaced'pairs of gripping jaws movable toward and from each other, rotatable cams pressing against saidy jaws to force the jaws of each pair towards each other, gears associated each with a respective cam to rotate said cam, rack bars each meshing with all of the gears on a respective side of said jaws, a pair of shafts, gears connecting said shafts for rotating the shafts in unison, a cam on each shaft having operative connection with the rack bars to reciprocate the same, spaced pairs of punching and bending members arranged to move at right angles to the jaws, each pair beingr arranged with its members on opposite Vsides of the series of jaws and operable oppositely to each other, land means for simultaneously actuating said punching and bendingl members in timed relation to the .closing of said jaws.

15. In a Vmachine of the kind described, 255spaced pairs of gripping jaws movable to- Wardfand from each other, rotatable cams Y vvpressing against said jaws to force the jaws ofy each pair towards eachother, gears associated each with a respective cam to rotate 0.said cam, rack bars each meshing withy all of the gears von a respective side of said jaw-s, a pairof shaft-s, gears connecting said shafts for rotating the shafts in unison, a cam on each shaft having operative connection vwith the rock bars to reciprocate the same,

V f spaced pai-rs of punching and bending members arranged to move at right angles to the jaws, 'each' pair being arranged with its members on opposite sides of the series of jaws 'i -jqand operable oppositely to each other, and

means for simultaneously actuating said punching and bending members in timed relationto the closing of said jaws, said last means including cams fixed on said shafts and engaging said punching and bending members.

Y In testimony whereof I atlix my signature.

. HAR-RY L. FINKELSTEIN. 

